Local tempature variation is just one of the threats. If you want a fairly serious organization's take on what the major threats are here is the DoD: ) Persist

Local tempature variation is just one of the threats. If you want a fairly serious organization's take on what the major threats are here is the DoD: ) Persistently recurring conditions such as flooding, drought, and higher temperatures ) More frequent and/or more severe extreme weather events ) Sea level rise and temperature changes ) Decreases in Arctic ice cover, type, and thickness http://archive.defense.gov/pubs/150724-congressional-report-on-national-implications-of-climate-change.pdf?source=govdelivery http://archive.defense.gov/pubs/150724-congressional-report-... One thing that short 2015 report does not cover is reduction in crop yields that frequently lead to conflict.